arch/arm/include/asm/ftrace.h

   1 #ifndef _ASM_ARM_FTRACE
   2 #define _ASM_ARM_FTRACE
   3
   4 #ifdef CONFIG_FUNCTION_TRACER
   5 #define MCOUNT_ADDR             ((long)(mcount))
   6 #define MCOUNT_INSN_SIZE        4 /* sizeof mcount call */
   7
   8 #ifndef __ASSEMBLY__
   9 extern void mcount(void);
  10 extern void __gnu_mcount_nc(void);
  11 #endif
  12
  13 #endif
  14
  15 #ifndef __ASSEMBLY__
  16
  17 #if defined(CONFIG_FRAME_POINTER) && !defined(CONFIG_ARM_UNWIND)
  18 /*
  19  * return_address uses walk_stackframe to do it's work.  If both
  20  * CONFIG_FRAME_POINTER=y and CONFIG_ARM_UNWIND=y walk_stackframe uses unwind
  21  * information.  For this to work in the function tracer many functions would
  22  * have to be marked with __notrace.  So for now just depend on
  23  * !CONFIG_ARM_UNWIND.
  24  */
  25
  26 void *return_address(unsigned int);
  27
  28 #else
  29
  30 extern inline void *return_address(unsigned int level)
  31 {
  32         return NULL;
  33 }
  34
  35 #endif
  36
  37 #define HAVE_ARCH_CALLER_ADDR
  38
  39 #define CALLER_ADDR0 ((unsigned long)__builtin_return_address(0))
  40 #define CALLER_ADDR1 ((unsigned long)return_address(1))
  41 #define CALLER_ADDR2 ((unsigned long)return_address(2))
  42 #define CALLER_ADDR3 ((unsigned long)return_address(3))
  43 #define CALLER_ADDR4 ((unsigned long)return_address(4))
  44 #define CALLER_ADDR5 ((unsigned long)return_address(5))
  45 #define CALLER_ADDR6 ((unsigned long)return_address(6))
  46
  47 #endif /* ifndef __ASSEMBLY__ */
  48
  49 #endif /* _ASM_ARM_FTRACE */